ximate not fundamental causes for the decline of the world's aboriginal races.
The author rejects the notion that some races are innately superior to others. He argues that from roughly the same starting point at the end of the Ice Age 13,000 years ago, parts of Eurasia possessed certain environmental advantages over other continents. One was the survival of most of the 14 species of domesticable mammals which served as sources of power, food, clothing and fertilizer and which
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